lib/MLIB/Graph/external/jpgraph/src/jpgraph_scatter.php

   1 <?php
   2 /*=======================================================================
   3 // File:        JPGRAPH_SCATTER.PHP
   4 // Description: Scatter (and impuls) plot extension for JpGraph
   5 // Created:     2001-02-11
   6 // Author:      Johan Persson (johanp@aditus.nu)
   7 // Ver:         $Id: jpgraph_scatter.php,v 1.31.2.1 2003/08/15 15:27:40 aditus Exp $
   8 //
   9 // License:     This code is released under QPL
  10 // Copyright (C) 2001,2002 Johan Persson
  11 //========================================================================
  12 */
  13
  14
  15 //===================================================
  16 // CLASS FieldArrow
  17 // Description: Draw an arrow at (x,y) with angle a
  18 //===================================================
  19 class FieldArrow {
  20     var $iSize=10;  // Length in pixels for  arrow
  21     var $iArrowSize = 2;
  22     var $iColor='black';
  23     var $isizespec = array(
  24         array(2,1),array(3,2),array(4,3),array(6,4),array(7,4),array(8,5),array(10,6),array(12,7),array(16,8),array(20,10));
  25     function FieldArrow() {
  26     }
  27
  28     function SetSize($aSize,$aArrowSize=2) {
  29         $this->iSize = $aSize;
  30         $this->iArrowSize = $aArrowSize;
  31     }
  32
  33     function SetColor($aColor) {
  34         $this->iColor = $aColor;
  35     }
  36
  37     function Stroke($aImg,$x,$y,$a) {
  38         $old_origin = $aImg->SetCenter($x,$y);
  39         $old_a = $aImg->SetAngle(-$a);
  40
  41         $dx = round($this->iSize/2);
  42         $c = array($x-$dx,$y,$x+$dx,$y);
  43         $x += $dx;
  44
  45         list($dx,$dy) = $this->isizespec[$this->iArrowSize];
  46         $ca = array($x,$y,$x-$dx,$y-$dy,$x-$dx,$y+$dy,$x,$y);
  47
  48         $aImg->SetColor($this->iColor);
  49         $aImg->Polygon($c);
  50         $aImg->FilledPolygon($ca);
  51
  52         $aImg->SetCenter($old_origin[0],$old_origin[1]);
  53         $aImg->SetAngle($old_a);
  54     }
  55 }
  56
  57 //===================================================
  58 // CLASS FieldPlot
  59 // Description: Render a field plot
  60 //===================================================
  61 class FieldPlot extends Plot {
  62     var $iAngles;
  63     var $iCallback='';
  64     function FieldPlot($datay,$datax,$angles) {
  65         if( (count($datax) != count($datay)) )
  66             JpGraphError::Raise("Fieldplots must have equal number of X and Y points.");
  67         if( (count($datax) != count($angles)) )
  68             JpGraphError::Raise("Fieldplots must have an angle specified for each X and Y points.");
  69
  70         $this->iAngles = $angles;
  71
  72         $this->Plot($datay,$datax);
  73         $this->value->SetAlign('center','center');
  74         $this->value->SetMargin(15);
  75
  76         $this->arrow = new FieldArrow();
  77     }
  78
  79     function SetCallback($aFunc) {
  80         $this->iCallback = $aFunc;
  81     }
  82
  83     function Stroke(&$img,&$xscale,&$yscale) {
  84
  85         // Remeber base color and size
  86         $bc = $this->arrow->iColor;
  87         $bs = $this->arrow->iSize;
  88         $bas = $this->arrow->iArrowSize;
  89
  90         for( $i=0; $i<$this->numpoints; ++$i ) {
  91             // Skip null values
  92             if( $this->coords[0][$i]==="" )
  93                 continue;
  94
  95             $f = $this->iCallback;
  96             if( $f != "" ) {
  97                 list($cc,$cs,$cas) = call_user_func($f,$this->coords[1][$i],$this->coords[0][$i],$this->iAngles[$i]);
  98                 // Fall back on global data if the callback isn't set
  99                 if( $cc  == "" ) $cc = $bc;
 100                 if( $cs  == "" ) $cs = $bs;
 101                 if( $cas == "" ) $cas = $bas;
 102                 //echo "f=$f, cc=$cc, cs=$cs, cas=$cas<br>";
 103                 $this->arrow->SetColor($cc);
 104                 $this->arrow->SetSize($cs,$cas);
 105             }
 106
 107             $xt = $xscale->Translate($this->coords[1][$i]);
 108             $yt = $yscale->Translate($this->coords[0][$i]);
 109
 110             $this->arrow->Stroke($img,$xt,$yt,$this->iAngles[$i]);
 111             $this->value->Stroke($img,$this->coords[0][$i],$xt,$yt);
 112         }
 113     }
 114
 115     // Framework function
 116     function Legend(&$aGraph) {
 117         if( $this->legend != "" ) {
 118             $aGraph->legend->Add($this->legend,$this->mark->fill_color,$this->mark,0,
 119                                  $this->legendcsimtarget,$this->legendcsimalt);
 120         }
 121     }
 122 }
 123
 124 //===================================================
 125 // CLASS ScatterPlot
 126 // Description: Render X and Y plots
 127 //===================================================
 128 class ScatterPlot extends Plot {
 129     var $impuls = false;
 130     var $linkpoints = false, $linkpointweight=1, $linkpointcolor="black";
 131 //---------------
 132 // CONSTRUCTOR
 133     function ScatterPlot($datay,$datax=false) {
 134         if( (count($datax) != count($datay)) && is_array($datax))
 135             JpGraphError::Raise("Scatterplot must have equal number of X and Y points.");
 136         $this->Plot($datay,$datax);
 137         $this->mark = new PlotMark();
 138         $this->mark->SetType(MARK_SQUARE);
 139         $this->mark->SetColor($this->color);
 140         $this->value->SetAlign('center','center');
 141         $this->value->SetMargin(0);
 142     }
 143
 144 //---------------
 145 // PUBLIC METHODS
 146     function SetImpuls($f=true) {
 147         $this->impuls = $f;
 148     }
 149
 150     // Combine the scatter plot points with a line
 151     function SetLinkPoints($aFlag=true,$aColor="black",$aWeight=1) {
 152         $this->linkpoints=$aFlag;
 153         $this->linkpointcolor=$aColor;
 154         $this->linkpointweight=$aWeight;
 155     }
 156
 157     function Stroke(&$img,&$xscale,&$yscale) {
 158
 159         $ymin=$yscale->scale_abs[0];
 160         if( $yscale->scale[0] < 0 )
 161             $yzero=$yscale->Translate(0);
 162         else
 163             $yzero=$yscale->scale_abs[0];
 164
 165         $this->csimareas = '';
 166         for( $i=0; $i<$this->numpoints; ++$i ) {
 167
 168             // Skip null values
 169             if( $this->coords[0][$i]==="" )
 170                 continue;
 171
 172             if( isset($this->coords[1]) )
 173                 $xt = $xscale->Translate($this->coords[1][$i]);
 174             else
 175                 $xt = $xscale->Translate($i);
 176             $yt = $yscale->Translate($this->coords[0][$i]);
 177
 178
 179             if( $this->linkpoints && isset($yt_old) ) {
 180                 $img->SetColor($this->linkpointcolor);
 181                 $img->SetLineWeight($this->linkpointweight);
 182                 $img->Line($xt_old,$yt_old,$xt,$yt);
 183             }
 184
 185             if( $this->impuls ) {
 186                 $img->SetColor($this->color);
 187                 $img->SetLineWeight($this->weight);
 188                 $img->Line($xt,$yzero,$xt,$yt);
 189             }
 190
 191             if( !empty($this->csimtargets[$i]) ) {
 192                 $this->mark->SetCSIMTarget($this->csimtargets[$i]);
 193                 $this->mark->SetCSIMAlt($this->csimalts[$i]);
 194             }
 195
 196             if( isset($this->coords[1]) ) {
 197                 $this->mark->SetCSIMAltVal($this->coords[0][$i],$this->coords[1][$i]);
 198             }
 199             else {
 200                 $this->mark->SetCSIMAltVal($this->coords[0][$i],$i);
 201             }
 202
 203             $this->mark->Stroke($img,$xt,$yt);
 204
 205             $this->csimareas .= $this->mark->GetCSIMAreas();
 206             $this->value->Stroke($img,$this->coords[0][$i],$xt,$yt);
 207
 208             $xt_old = $xt;
 209             $yt_old = $yt;
 210         }
 211     }
 212
 213     // Framework function
 214     function Legend(&$aGraph) {
 215         if( $this->legend != "" ) {
 216             $aGraph->legend->Add($this->legend,$this->mark->fill_color,$this->mark,0,
 217                                  $this->legendcsimtarget,$this->legendcsimalt);
 218         }
 219     }
 220 } // Class
 221 /* EOF */
 222 ?>